The RC4-HMAC Kerberos Encryption Types Used by Microsoft Windows, December 2006
- File formats:
- HISTORIC (changed from INFORMATIONAL May 2018)
- Updated by:
- RFC 6649
- K. Jaganathan
- NON WORKING GROUP
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The Microsoft Windows 2000 implementation of Kerberos introduces a new encryption type based on the RC4 encryption algorithm and using an MD5 HMAC for checksum. This is offered as an alternative to using the existing DES-based encryption types.
The RC4-HMAC encryption types are used to ease upgrade of existing Windows NT environments, provide strong cryptography (128-bit key lengths), and provide exportable (meet United States government export restriction requirements) encryption. This document describes the implementation of those encryption types. This memo provides information for the Internet community.
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 4844.